View Compilation Error

0_0_12927676_7627.cpp:37: error: expected `]' before ';' token
0_0_12927676_7627.cpp: In function `void build(int, int, int)':
0_0_12927676_7627.cpp:47: error: `nod' undeclared (first use this function)
0_0_12927676_7627.cpp:47: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12927676_7627.cpp: In function `void update(int, int, int, int)':
0_0_12927676_7627.cpp:58: error: `nod' undeclared (first use this function)
0_0_12927676_7627.cpp: In function `int query(int, int)':
0_0_12927676_7627.cpp:82: error: `nod' undeclared (first use this function)